Blowing and reciprocating motion combined with little straw full feeding axial flow threshing cylinder

Abstract

The invention discloses a threshing cylinder with air blowing and reciprocating motion for full feeding of little straw, which belongs to agricultural machinery. A driving bevel gear is fixed on the main shaft, and tracks are fixed on the front and rear sides of the frame. A semicircular screen is movably supported on the tracks by rollers. A conical air barrel with a wind pipe is fixed on the front and rear sides of the lower part of the semicircular screen. The wind pipe connects the conical air barrel with the inner cavity of the semicircular screen. A driving shaft is vertically inserted into the frame and can rotate. A driven bevel gear and a driving disc are fixed on the upper and lower ends of the driving shaft, respectively. A crank fixed on the driving disc and a driving block fixed on the semicircular screen are hingedly connected to the two ends of a connecting rod, respectively. A cover is fixed on the upper end of the frame. The cylinder has the advantages of low seed loss, high seed recovery rate, low power consumption, reasonable structure and compactness.

Description

TECHNICAL FIELD

[0001] The present application belongs to agricultural machinery, and mainly relates to a threshing cylinder. BACKGROUND

[0002] The axial flow threshing cylinder is a full feeding threshing device. During operation, the crop stalks and heads are all fed into the threshing cylinder, and the crop grains are separated from the heads under the beating and combing of the nails and the rubbing of the stalks. Since the stalks participate in the threshing during the threshing operation, the pulling force of the stalks can make the grains more easily separated, thereby improving the threshing efficiency and the threshing rate. Therefore, the multi-stalk feeding is still adopted at present. However, it is found in the multi-year operation practice that the multi-stalk feeding has the problem of a large amount of grain loss caused by the separated grains being carried in the stalk layer and discharged out of the machine with the stalks, and the grain separation and recovery rate is reduced. Meanwhile, the multi-stalk feeding causes the blockage of the threshing cylinder when the feeding amount is large, the failure rate is high, and the operation power consumption is increased.

[0003] In the scientific research test, the axial flow threshing cylinder with the existing structure is used for the few-stalk threshing, the power consumption is reduced, the cylinder blockage is not easy to occur, but the grain recovery rate and the entrainment loss rate are still not ideal, and the threshing operation requirements cannot be met. Therefore, it is necessary to develop an axial flow threshing cylinder suitable for the few-stalk full feeding threshing to greatly improve the grain recovery rate, reduce the entrainment loss rate, and meet the operation requirements. SUMMARY

[0004] The purpose of the present application is to solve the problems in the prior art, and to develop and design a few-stalk full feeding axial flow threshing cylinder combined with air blowing and reciprocating motion, so as to be suitable for the few-stalk threshing operation, have a high grain recovery rate, and have a low entrainment loss rate.

[0005] The purpose of the present application is achieved in that: a driving bevel gear is fixed on the main shaft at the position between the supporting disc and the driving wheel; tracks are respectively fixed on the front side and the rear side of the frame and parallel to the main shaft, a semicircular screen is supported on the tracks by four rollers and can reciprocate, a conical wind barrel is hung on the front side and the rear side of the semicircular screen by annular seats, a plurality of air pipes are fixed on the side wall of the conical wind barrel and are inserted into the semicircular screen, and the conical wind barrel is communicated with the upper cavity of the semicircular screen; a driving shaft is vertically inserted and fixed on the frame at the position below the driving bevel gear and can rotate in the axial and radial directions, a driven bevel gear and a driving disc are respectively fixed on the upper end and the lower end of the driving shaft, a crank is fixed on the lower end surface of the driving disc, a driving block is fixed on the semicircular screen, and the two ends of a connecting rod are respectively hinged to the driving block and the crank; a cover is installed on the frame above the spiral feeding head, the tine shaft and the driving bevel gear, thus forming the air blowing and reciprocating combined less-stalk full-feeding axial-flow threshing cylinder.

[0006] The present application adopts the cooperation of the semicircular screen which can reciprocate on the frame and the tines on the rotating tine shaft for threshing, and the grains which are threshed and entrained in the stalks are shaken and separated from the semicircular screen during the backward conveying of the stalks, and the air blowing auxiliary cooperation is also adopted, which further promotes the separation of the grains from the entrained stalk layer, and the present application has the characteristics of novel, unique, reasonable, compact structure, high grain recovery rate, less entrainment loss and small power consumption, and provides technical support and guarantee for the application of the less-stalk threshing agricultural technology method. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 is the overall structure schematic diagram of the air blowing and reciprocating combined less-stalk full-feeding axial-flow threshing cylinder;

[0008] Figure 2 is Figure 1 is the structure schematic diagram after removing the cover in the middle;

[0009] Figure 3 is the assembly structure schematic diagram of the semicircular screen and the conical wind barrel;

[0010] Figure 4 is the reciprocating driving structure schematic diagram of the semicircular screen;

[0011] Figure 5 is the assembly structure schematic diagram of the conical wind barrel and the air pipe.

[0012] EXPLANATION OF REFERENCE NUMBERS IN DRAWINGS:

[0013] 1, main shaft, 2, spiral feeding head, 3, cover, 4, driving wheel, 5, track, 6, frame, 7, annular seat, 8, conical wind bucket, 9, semicircular screen, 10, tine shaft, 11, tine, 12, support disc, 13, driven bevel gear, 14, driving bevel gear, 15, driving shaft, 16, driving disc, 17, roller, 18, air pipe, 19, crank, 20, connecting rod, 21, driving block. DETAILED DESCRIPTION

[0014] The embodiments of the present application are described in detail below with reference to the accompanying drawings. A blowing and reciprocating motion combined less straw full feeding axial flow threshing cylinder includes a frame 6, a main shaft 1 is axially and radially positioned on the upper end of the frame 6 and supported and installed for rotation in the circumferential direction, a spiral feeding head 2, a support disc 12 and a driving wheel 4 are sequentially and fixedly installed on the main shaft 1 from left to right, a plurality of tine shafts 10 with tines 11 are supported and fixed between the spiral feeding head 2 and the support disc 12, the tine shafts 10 are parallel to the main shaft 1, a driving bevel gear 14 is fixed on the main shaft 1 at a position between the support disc 12 and the driving wheel 4, tracks 5 are respectively fixed on the front side and the rear side of the frame 6 and parallel to the main shaft 1, a semicircular screen 9 is reciprocally supported and installed on the tracks 5 by four rollers 17, conical wind buckets 8 are respectively hung and fixed on the front lower side and the rear lower side of the semicircular screen 9 by annular seats 7, a plurality of air pipes 18 are fixed on the side wall of the conical wind bucket 8 and inclined to the right, the air pipes 18 are inserted into the semicircular screen 9 to communicate the conical wind bucket 8 with the upper side inner chamber of the semicircular screen 9, a driving shaft 15 is axially and radially positioned and vertically inserted and installed for rotation in the circumferential direction below the driving bevel gear 14, a driven bevel gear 13 and a driving disc 16 are respectively fixed on the upper end and the lower end of the driving shaft 15, a crank 19 is fixed on the lower end surface of the driving disc 16, a driving block 21 is fixed on the semicircular screen 9, and the two ends of a connecting rod 20 are respectively hingedly connected with the driving block 21 and the crank 19, and a cover 3 is installed on the frame 6 above the spiral feeding head 2, the tine shafts 10 and the driving bevel gear 14.

[0015] When the machine is in use, the rotary power from the external power source drives the driving wheel 4, the main shaft 1, the supporting disc 12, the spiral feeding head 2, the tine shaft 10 with tines 11 in turn, and sends the straw stalks fed from the spiral feeding head 2 into the axial flow cylinder to complete the threshing and separating operation under the cooperation of the semicircular screen 9. At the same time, the driving cone gear 14 rotates with the main shaft 1, drives the crank 19 through the driven cone gear 13, the driving shaft 15 and the driving disc 16, pushes and pulls the semicircular screen 9 to move linearly back and forth on the track 5 through the connecting rod 20 and the driving block 21, and under the support and cooperation of the roller 17, increases the separation of the threshed grains under the shaking action. At the same time, the positive pressure blowing air flow from the conical air barrel 8 is sent into the cavity above the semicircular screen 9 through the air pipe 18, the separated grains are separated from the straw layer under the blowing and intervention of the pressure air flow, and the straw residues flow to the discharge port at the rear end of the axial flow cylinder assembly, and the threshing and separating operation is completed.

[0016] The conical air barrel 8 can ensure the uniformity of the air volume of the multiple air pipes 18.

Claims

1. A combined air-blowing and reciprocating motion axial flow threshing drum with low straw feeding, comprising a frame (6), a main shaft (1) axially and radially positioned and rotatably supported on the upper end of the frame (6), a spiral feed head (2), a support disc (12) and a drive wheel (4) sequentially fixed on the main shaft (1) from left to right, and multiple toothed shafts (10) with toothed (11) fixedly supported between the spiral feed head (2) and the support disc (12), wherein the toothed shafts (10) are parallel to the main shaft (1), characterized in that: A drive bevel gear (14) is fixed on the main shaft (1) at the position between the support disc (12) and the drive wheel (4); a track (5) is fixed on the front and rear sides of the frame (6) parallel to the main shaft (1), and a semi-circular screen (9) is supported and installed on the track (5) by four rollers (17) in a reciprocating motion. A conical air bucket (8) is fixed on the lower front and lower rear sides of the semi-circular screen (9) by a ring seat (7), and multiple air pipes (18) are fixed on the side wall of the conical air bucket (8) at an angle to the right. The multiple air pipes (18) are inserted into the semi-circular screen (9), and the conical air bucket (8) and the semi-circular screen (9) are connected. The upper inner chamber is connected; a drive shaft (15) is vertically inserted into the frame (6) below the active bevel gear (14) with axial and radial positioning and circumferential rotatability. A driven bevel gear (13) and a drive disk (16) are fixed on the upper and lower ends of the drive shaft (15), respectively. A crank (19) is fixed on the lower end face of the drive disk (16). A drive block (21) is fixed on the semi-circular screen (9). The two ends of the connecting rod (20) are hinged to the drive block (21) and the crank (19), respectively. A cover (3) is installed on the frame (6) above the spiral feed head (2), the spiked shaft (10), and the active bevel gear (14).

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